A woman's father, a scientist, receives repeated death threats and eventually ends up dead. Receiving no help from the police, the woman begins to realize that she is next.
| Actor | Role |
|---|---|
 Raymond SouplexCommissioner Serval | Commissioner Serval |
 Gilbert GilPaul Roubais | Paul Roubais |
 Renée CosimaCatherine Muller | Catherine Muller |
 François DegueltInspector François Garnier | Inspector François Garnier |
 Pierre DorisInspector Bourdier | Inspector Bourdier |
 Daniel EmilforkLeader of the undertaker gang | Leader of the undertaker gang |
 Jean TissierGardener | Gardener |
 Jean DaurandServal's deputy | Serval's deputy |
 Guy PiérauldInspector Martin | Inspector Martin |
 Lucien RaimbourgMonsieur Muller | Monsieur Muller |
| FFrancine AllardChambermaid | Chambermaid |
| HHenri de ChaptalMember of the undertaker gang | Member of the undertaker gang |
| CChristian DunilNot listed | Not listed |
| CClaude SorelMaid | Maid |
 François DyrekMember of the undertaker gang | Member of the undertaker gang |
| JJacques de LannoyMember of the undertaker gang | Member of the undertaker gang |
| IIsa RambaudGas station attendant | Gas station attendant |
 Paulette DubostHélène Serval | Hélène Serval |
 Noël RoquevertCommander Henri Muller | Commander Henri Muller |